diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index 1b6475c..70bedab 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -340,9 +340,9 @@
 		struct ip_rt_acct *st = per_cpu_ptr(ip_rt_acct, smp_processor_id());
 		u32 idx = skb->dst->tclassid;
 		st[idx&0xFF].o_packets++;
-		st[idx&0xFF].o_bytes+=skb->len;
+		st[idx&0xFF].o_bytes += skb->len;
 		st[(idx>>16)&0xFF].i_packets++;
-		st[(idx>>16)&0xFF].i_bytes+=skb->len;
+		st[(idx>>16)&0xFF].i_bytes += skb->len;
 	}
 #endif